giving to steal and cruel kind, a heart to fear,to doubt a mind,
Yeah, this chunk is a little obscure, but we're going to go with the idea that we're hearing more about the bad stuff of the world.
So, these lines could be saying that the generous spirit of giving has turned into stealing and kindness has turned into cruelty.
Hearts are filled with fear, and they fill the mind with doubts.
Ugh, we're getting depressed.
Lines 59-60
to differ a disease of same, conform the pinnacle of am
These last two lines seem to be about one of Cummings's favorites topics: the dangers of conformity.
The "disease of same" seems to be getting at the idea that everybody trying to be alike is some kind of awful plague. Those who "differ" are all being infected.
We think the image of the "pinnacle of am" is just the jam—what a great way to describe the power of the individual.
Cummings is having fun with "to be" verbs again, and has his speaker use "am" to embody the self.
So, if it's a "pinnacle of am," it's kind of putting the power of the individual on a pedestal.
Unfortunately, these lines seem to be saying that this "disease of same" is out to "conform" this tower of individualism and make it like everything else.